Shock-absorbing support for electric lamps



Q 1, 21, 1 March 22, 1927. s. SOKOLOW 6 6 0 snocx ABSORBING' s'uPPo T won ELECTRIC LAMPS Filed Dec. 51, 1924 I 2 Sheets-Sheet 1 S. SOKOLOW March 22,1927. 1,621,610

SHOCK ABSORBING SUPPORT FOR ELECTRIC LAMPS Filed Dec. 31, 1924 Y 2 Sheets-Sheet 2 Patented Mar. 22, 1927.

COMPANY, A .coaroaaraon er nn'wronx.

swan -s stewar has aerate ar-e 1 .M- was The present invention has relationto an improved shock-absorbing rnoun'ting for incandescent electric lamps. 'This improved mounting' is intended for .usein the support of incandescent electric lairips Qwhereyer they are liablet o receive blows or shocks, as it pros ides a liig'fhly-eztlicier t, simple and reliable means fo'r producing the necessary electric connection while at the same time 10 preventing the transmission of injurious shocks to the bulb.

This invention finds a particularly favorable application in the mounting of small electric'bulbs in portable flash lights of the type in which a. battery is carried in the easing which supports the lamp; and the invention has therefore been herein illustrated and described in that, specific connection. although it is to be understood that the invention is not limited in its scope to portable flash lights.

In the accompanying drawings, Figure 1 'is an enlarged view of the support in Vertical section, showing the electric bulb in elevation, and Figure 2 is a side elevation of one form of portable flashlight partly broken away to disclose the preferred mode of carrying the shock-absorbing support within the casing.

As preferably constructed, the shock-absorbing support comprises an exterior cylindrical metallic shell 10, having a depressed flat top 11, furnished with a central threaded neck 12, into which screws in the usual manner an electric lamp bulb 13. This cylinder, with its flat top and neck, is preferably all spun from a single piece of sheet metal, as shown.

At the end of the cylinder opposite to the neck 12 is an insulating disc, 14, preferably secured in place between a circular beading 15 spun in the cylinder 10 and the inturned edge thereof shown'at 16. The disc 14 has a central aperture 17 which accon'nnoda'tes an outwardly protruding thin movable metal cup 18, which is prevented from coming out by a flange 19 lying against the inner surface of thedisc 14:. r I

Lying against the inner surface of the flat topll is a second insulating disc20 having a. central opening 21, similar to'17. Through this opening there protrudes a second movable cup 22, also provided with a flange 28.

'A coiled spring 24 with its opposite ends within these two cups 18 and. 22, tends conta l e ritehe a a t i d the fiililgs'lti 23 against the discs '14 and 20. i sli 'wnin Figure 1, t heupper cup 22 extends into the lower portion of the neck 12, and, when the bulb 131s in place, its 7 central "terininal'l25 makes electric contact vit-h the top of cup 22,, pressing "it slightlydo wnward, asshownl i i If, now, any exterior conducting terminal be pushed up against the outside'of the cup 18, further compressing the spring 24;, it is cle-arthat there will bean electrical connectionbetween'such exterior terminal and the lame V i 8 central bulb terminal, through the cup 18 the spring 24 and the cup 22.

Qne instance of av connectlon of this kind form of which is shown in Figure 2.

In this figure, a well known form of fiber or slmilar insulating caslng is shown at 26.

This carries acap 27 whichscrews onto a is found in portable electric flash lights, one 7 and a metal plate. 31 attached to the head 30 but insulated therefrom bythe insulating disc 32, The plate 31 has. a threaded" neck 33 which projects upward through a central opening in the disc 32, without touching the head 30. The neck 12 of the shock absorber screws up 'into'this neck 33.

When the battery cells 3 1- are introduced in the usual manner, the topmost carbon terminal 35 is pushed up against the lower cup 18 of the connecting shock absorber as hitherto described and as shown in Figure2 When electric connection is made in a well known manner through the thumb-switch 36, from the lowermost zinc of the cells 34 to the plate 31, current will bethereby con veyed through neck 33, neck 12, exterior terminal of the lamp, 13, through the lamp filament, back to the central lamp terminal cup 22,spring 24, and cup 18 to the uppermost carbon terminal 35 of the battery.

' The connecting shock-absorber described can be used in other well known forms of portable flash lights, whether having insulating ormetallic bodies; and, as already stated, may beused in connections other than flashlights;

. a I The duplex spring-guiding and compress,-

ing device herein described afiords means 7 ing transmitted to the electric'bulb.

What isclaimed is 1. A connecting shock absorbing support for electric lamp bulbs comprising an exterior casing, means at one end thereof for I receiving a lamp bulb, a single compressible spring under the lamp bulb, a movable conducting terminal at each end of said spring, one terminal being adapted to make contact under the central terminal of the lamp bulb, and an insulating guide for each of said terminals. V

2. A connecting shock absorbing support for electric lamp bulbs comprising a hollow casing having insulating ends, means at one end of the same for receiving a lamp bulb, a compressible spring under the center of the lamp bulb free to expand and contract Within the hollow casing and movable conducting terminal at each end of said spring.

3. Apparatus as in claim 1 in combination with a support therefor comprising an insulating disc with a central aperture, a thread ed metallic head fixed to one face of said disc, a conducting plate fixed on the other side ct said disc and having a threaded neck extending up through the aperture in the disc Without touching said metallic head.

In testimony whereof I have hereto set my hand on this 3d day of December 1924.

SAMUEL soKoLoW. 

